//------------------------------------------------------------------------------
//  此代码版权（除特别声明或在XREF结尾的命名空间的代码）归作者本人若汝棋茗所有
//  源代码使用协议遵循本仓库的开源协议及附加协议，若本仓库没有设置，则按MIT开源协议授权
//  CSDN博客：https://blog.csdn.net/qq_40374647
//  哔哩哔哩视频：https://space.bilibili.com/94253567
//  Gitee源代码仓库：https://gitee.com/RRQM_Home
//  Github源代码仓库：https://github.com/RRQM
//  API首页：https://touchsocket.net/
//  交流QQ群：234762506
//  感谢您的下载和使用
//------------------------------------------------------------------------------

namespace TouchSocket.Core
{
    /// <summary>
    /// MetadataFastBinaryConverter
    /// </summary>
    internal sealed class MetadataFastBinaryConverter : FastBinaryConverter<Metadata>
    {
        protected override Metadata Read(byte[] buffer, int offset, int len)
        {
            var byteBlock = new ValueByteBlock(buffer);
            byteBlock.Pos = offset;

            var isNull = byteBlock.ReadIsNull();
            if (isNull)
            {
                return null;
            }
            else
            {
                var metadata = new Metadata();
                while (byteBlock.Pos < offset + len)
                {
                    metadata.Add(byteBlock.ReadString(), byteBlock.ReadString());
                }
                return metadata;
            }
        }

        protected override int Write(ByteBlock byteBlock, Metadata obj)
        {
            var pos = byteBlock.Pos;
            byteBlock.WriteIsNull(obj);
            foreach (var item in obj.Keys)
            {
                byteBlock.Write(item);
                byteBlock.Write(obj[item]);
            }
            return byteBlock.Pos - pos;
        }
    }
}